ELBに紐付くインスタンスの状態一覧を表示するスクリプト。

elb_instannces_status.rb

require "aws-sdk"

['us-east-1', 'ap-northeast-1'].each do |region|
  AWS::ELB.new(region: region).load_balancers.each do |elb|
    elb.client.describe_instance_health(load_balancer_name: elb.name)[:instance_states].each do |h|
      puts "#{region}\t#{elb.name}\t#{h[:instance_id]}\t#{h[:state]}\t#{h[:description]}\t#{h[:reason_code]}"
    end
  end
end